1 /* $NetBSD: if_qn.c,v 1.40 2015/05/20 09:17:17 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Mika Kortelainen 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mika Kortelainen 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * Thanks for Aspecs Oy (Finland) for the data book for the NIC used 33 * in this card and also many thanks for the Resource Management Force 34 * (QuickNet card manufacturer) and especially Daniel Koch for providing 35 * me with the necessary 'inside' information to write the driver. 36 * 37 * This is partly based on other code: 38 * - if_ed.c: basic function structure for Ethernet driver and now also 39 * qn_put() is done similarly, i.e. no extra packet buffers. 40 * 41 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 42 * adapters. 43 * 44 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 45 * 46 * Copyright (C) 1993, David Greenman. This software may be used, 47 * modified, copied, distributed, and sold, in both source and binary 48 * form provided that the above copyright and these terms are retained. 49 * Under no circumstances is the author responsible for the proper 50 * functioning of this software, nor does the author assume any 51 * responsibility for damages incurred with its use. 52 * 53 * - if_es.c: used as an example of -current driver 54 * 55 * Copyright (c) 1995 Michael L. Hitch 56 * All rights reserved. 57 * 58 * - if_fe.c: some ideas for error handling for qn_rint() which might 59 * have fixed those random lock ups, too. 60 * 61 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 62 * 63 * 64 * TODO: 65 * - add multicast support 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: if_qn.c,v 1.40 2015/05/20 09:17:17 ozaki-r Exp $"); 70 71 #include "qn.h" 72 #if NQN > 0 73 74 #define QN_DEBUG 75 #define QN_DEBUG1_no /* hides some old tests */ 76 #define QN_CHECKS_no /* adds some checks (not needed in normal situations) */ 77 78 79 /* 80 * Fujitsu MB86950 Ethernet Controller (as used in the QuickNet QN2000 81 * Ethernet card) 82 */ 83 84 #include "opt_inet.h" 85 #include "opt_ns.h" 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/mbuf.h> 90 #include <sys/buf.h> 91 #include <sys/device.h> 92 #include <sys/protosw.h> 93 #include <sys/socket.h> 94 #include <sys/syslog.h> 95 #include <sys/ioctl.h> 96 #include <sys/errno.h> 97 98 #include <net/if.h> 99 #include <net/if_dl.h> 100 #include <net/if_ether.h> 101 102 #ifdef INET 103 #include <netinet/in.h> 104 #include <netinet/in_systm.h> 105 #include <netinet/in_var.h> 106 #include <netinet/ip.h> 107 #include <netinet/if_inarp.h> 108 #endif 109 110 #include <machine/cpu.h> 111 #include <amiga/amiga/device.h> 112 #include <amiga/amiga/isr.h> 113 #include <amiga/dev/zbusvar.h> 114 #include <amiga/dev/if_qnreg.h> 115 116 117 #define NIC_R_MASK (R_INT_PKT_RDY | R_INT_ALG_ERR |\ 118 R_INT_CRC_ERR | R_INT_OVR_FLO) 119 #define MAX_PACKETS 30 /* max number of packets read per interrupt */ 120 121 /* 122 * Ethernet software status per interface 123 * 124 * Each interface is referenced by a network interface structure, 125 * qn_if, which the routing code uses to locate the interface. 126 * This structure contains the output queue for the interface, its address, ... 127 */ 128 struct qn_softc { 129 device_t sc_dev; 130 struct isr sc_isr; 131 struct ethercom sc_ethercom; /* Common ethernet structures */ 132 u_char volatile *sc_base; 133 u_char volatile *sc_nic_base; 134 u_short volatile *nic_fifo; 135 u_short volatile *nic_r_status; 136 u_short volatile *nic_t_status; 137 u_short volatile *nic_r_mask; 138 u_short volatile *nic_t_mask; 139 u_short volatile *nic_r_mode; 140 u_short volatile *nic_t_mode; 141 u_short volatile *nic_reset; 142 u_short volatile *nic_len; 143 u_char transmit_pending; 144 } qn_softc[NQN]; 145 146 #include <net/bpf.h> 147 #include <net/bpfdesc.h> 148 149 150 int qnmatch(device_t, cfdata_t, void *); 151 void qnattach(device_t, device_t, void *); 152 int qnintr(void *); 153 int qnioctl(struct ifnet *, u_long, void *); 154 void qnstart(struct ifnet *); 155 void qnwatchdog(struct ifnet *); 156 void qnreset(struct qn_softc *); 157 void qninit(struct qn_softc *); 158 void qnstop(struct qn_softc *); 159 static u_short qn_put(u_short volatile *, struct mbuf *); 160 static void qn_rint(struct qn_softc *, u_short); 161 static void qn_flush(struct qn_softc *); 162 static void inline word_copy_from_card(u_short volatile *, u_short *, u_short); 163 static void inline word_copy_to_card(u_short *, u_short volatile *, 164 register u_short); 165 static void qn_get_packet(struct qn_softc *, u_short); 166 #ifdef QN_DEBUG1 167 static void qn_dump(struct qn_softc *); 168 #endif 169 170 CFATTACH_DECL_NEW(qn, sizeof(struct qn_softc), 171 qnmatch, qnattach, NULL, NULL); 172 173 int 174 qnmatch(device_t parent, cfdata_t cf, void *aux) 175 { 176 struct zbus_args *zap; 177 178 zap = (struct zbus_args *)aux; 179 180 /* RMF QuickNet QN2000 EtherNet card */ 181 if (zap->manid == 2011 && zap->prodid == 2) 182 return (1); 183 184 return (0); 185 } 186 187 /* 188 * Interface exists: make available by filling in network interface 189 * record. System will initialize the interface when it is ready 190 * to accept packets. 191 */ 192 void 193 qnattach(device_t parent, device_t self, void *aux) 194 { 195 struct zbus_args *zap; 196 struct qn_softc *sc = device_private(self); 197 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 198 u_int8_t myaddr[ETHER_ADDR_LEN]; 199 200 zap = (struct zbus_args *)aux; 201 202 sc->sc_base = zap->va; 203 sc->sc_nic_base = sc->sc_base + QUICKNET_NIC_BASE; 204 sc->nic_fifo = (u_short volatile *)(sc->sc_nic_base + NIC_BMPR0); 205 sc->nic_len = (u_short volatile *)(sc->sc_nic_base + NIC_BMPR2); 206 sc->nic_t_status = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR0); 207 sc->nic_r_status = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR2); 208 sc->nic_t_mask = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR1); 209 sc->nic_r_mask = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR3); 210 sc->nic_t_mode = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR4); 211 sc->nic_r_mode = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR5); 212 sc->nic_reset = (u_short volatile *)(sc->sc_nic_base + NIC_DLCR6); 213 sc->transmit_pending = 0; 214 215 /* 216 * The ethernet address of the board (1st three bytes are the vendor 217 * address, the rest is the serial number of the board). 218 */ 219 myaddr[0] = 0x5c; 220 myaddr[1] = 0x5c; 221 myaddr[2] = 0x00; 222 myaddr[3] = (zap->serno >> 16) & 0xff; 223 myaddr[4] = (zap->serno >> 8) & 0xff; 224 myaddr[5] = zap->serno & 0xff; 225 226 /* set interface to stopped condition (reset) */ 227 qnstop(sc); 228 229 memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 230 ifp->if_softc = sc; 231 ifp->if_ioctl = qnioctl; 232 ifp->if_watchdog = qnwatchdog; 233 ifp->if_start = qnstart; 234 /* XXX IFF_MULTICAST */ 235 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 236 ifp->if_mtu = ETHERMTU; 237 238 /* Attach the interface. */ 239 if_attach(ifp); 240 ether_ifattach(ifp, myaddr); 241 242 #ifdef QN_DEBUG 243 printf(": hardware address %s\n", ether_sprintf(myaddr)); 244 #endif 245 246 sc->sc_isr.isr_intr = qnintr; 247 sc->sc_isr.isr_arg = sc; 248 sc->sc_isr.isr_ipl = 2; 249 add_isr(&sc->sc_isr); 250 } 251 252 /* 253 * Initialize device 254 * 255 */ 256 void 257 qninit(struct qn_softc *sc) 258 { 259 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 260 u_short i; 261 static int retry = 0; 262 263 *sc->nic_r_mask = NIC_R_MASK; 264 *sc->nic_t_mode = NO_LOOPBACK; 265 266 if (sc->sc_ethercom.ec_if.if_flags & IFF_PROMISC) { 267 *sc->nic_r_mode = PROMISCUOUS_MODE; 268 log(LOG_INFO, "qn: Promiscuous mode (not tested)\n"); 269 } else 270 *sc->nic_r_mode = NORMAL_MODE; 271 272 /* Set physical ethernet address. */ 273 for (i = 0; i < ETHER_ADDR_LEN; i++) 274 *((u_short volatile *)(sc->sc_nic_base+ 275 QNET_HARDWARE_ADDRESS+2*i)) = 276 ((((u_short)CLLADDR(ifp->if_sadl)[i]) << 8) | 277 CLLADDR(ifp->if_sadl)[i]); 278 279 ifp->if_flags |= IFF_RUNNING; 280 ifp->if_flags &= ~IFF_OACTIVE; 281 sc->transmit_pending = 0; 282 283 qn_flush(sc); 284 285 /* QuickNet magic. Done ONLY once, otherwise a lockup occurs. */ 286 if (retry == 0) { 287 *((u_short volatile *)(sc->sc_nic_base + QNET_MAGIC)) = 0; 288 retry = 1; 289 } 290 291 /* Enable data link controller. */ 292 *sc->nic_reset = ENABLE_DLC; 293 294 /* Attempt to start output, if any. */ 295 qnstart(ifp); 296 } 297 298 /* 299 * Device timeout/watchdog routine. Entered if the device neglects to 300 * generate an interrupt after a transmit has been started on it. 301 */ 302 void 303 qnwatchdog(struct ifnet *ifp) 304 { 305 struct qn_softc *sc = ifp->if_softc; 306 307 log(LOG_INFO, "qn: device timeout (watchdog)\n"); 308 ++sc->sc_ethercom.ec_if.if_oerrors; 309 310 qnreset(sc); 311 } 312 313 /* 314 * Flush card's buffer RAM. 315 */ 316 static void 317 qn_flush(struct qn_softc *sc) 318 { 319 #if 1 320 /* Read data until bus read error (i.e. buffer empty). */ 321 while (!(*sc->nic_r_status & R_BUS_RD_ERR)) 322 (void)(*sc->nic_fifo); 323 #else 324 /* Read data twice to clear some internal pipelines. */ 325 (void)(*sc->nic_fifo); 326 (void)(*sc->nic_fifo); 327 #endif 328 329 /* Clear bus read error. */ 330 *sc->nic_r_status = R_BUS_RD_ERR; 331 } 332 333 /* 334 * Reset the interface. 335 * 336 */ 337 void 338 qnreset(struct qn_softc *sc) 339 { 340 int s; 341 342 s = splnet(); 343 qnstop(sc); 344 qninit(sc); 345 splx(s); 346 } 347 348 /* 349 * Take interface offline. 350 */ 351 void 352 qnstop(struct qn_softc *sc) 353 { 354 355 /* Stop the interface. */ 356 *sc->nic_reset = DISABLE_DLC; 357 delay(200); 358 *sc->nic_t_status = CLEAR_T_ERR; 359 *sc->nic_t_mask = CLEAR_T_MASK; 360 *sc->nic_r_status = CLEAR_R_ERR; 361 *sc->nic_r_mask = CLEAR_R_MASK; 362 363 /* Turn DMA off */ 364 *((u_short volatile *)(sc->sc_nic_base + NIC_BMPR4)) = 0; 365 366 /* Accept no packets. */ 367 *sc->nic_r_mode = 0; 368 *sc->nic_t_mode = 0; 369 370 qn_flush(sc); 371 } 372 373 /* 374 * Start output on interface. Get another datagram to send 375 * off the interface queue, and copy it to the 376 * interface before starting the output. 377 * 378 * This assumes that it is called inside a critical section... 379 * 380 */ 381 void 382 qnstart(struct ifnet *ifp) 383 { 384 struct qn_softc *sc = ifp->if_softc; 385 struct mbuf *m; 386 u_short len; 387 int timout = 60000; 388 389 390 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 391 return; 392 393 IF_DEQUEUE(&ifp->if_snd, m); 394 if (m == 0) 395 return; 396 397 /* 398 * If bpf is listening on this interface, let it 399 * see the packet before we commit it to the wire 400 * 401 * (can't give the copy in QuickNet card RAM to bpf, because 402 * that RAM is not visible to the host but is read from FIFO) 403 */ 404 bpf_mtap(ifp, m); 405 len = qn_put(sc->nic_fifo, m); 406 m_freem(m); 407 408 /* 409 * Really transmit the packet. 410 */ 411 412 /* Set packet length (byte-swapped). */ 413 len = ((len >> 8) & 0x0007) | TRANSMIT_START | ((len & 0x00ff) << 8); 414 *sc->nic_len = len; 415 416 /* Wait for the packet to really leave. */ 417 while (!(*sc->nic_t_status & T_TMT_OK) && --timout) { 418 if ((timout % 10000) == 0) 419 log(LOG_INFO, "qn: timout...\n"); 420 } 421 422 if (timout == 0) 423 /* Maybe we should try to recover from this one? */ 424 /* But now, let's just fall thru and hope the best... */ 425 log(LOG_INFO, "qn: transmit timout (fatal?)\n"); 426 427 sc->transmit_pending = 1; 428 *sc->nic_t_mask = INT_TMT_OK | INT_SIXTEEN_COL; 429 430 ifp->if_flags |= IFF_OACTIVE; 431 ifp->if_timer = 2; 432 } 433 434 /* 435 * Memory copy, copies word at a time 436 */ 437 static void inline 438 word_copy_from_card(u_short volatile *card, u_short *b, u_short len) 439 { 440 register u_short l = len/2; 441 442 while (l--) 443 *b++ = *card; 444 } 445 446 static void inline 447 word_copy_to_card(u_short *a, u_short volatile *card, register u_short len) 448 { 449 /*register u_short l = len/2;*/ 450 451 while (len--) 452 *card = *a++; 453 } 454 455 /* 456 * Copy packet from mbuf to the board memory 457 * 458 */ 459 static u_short 460 qn_put(u_short volatile *addr, struct mbuf *m) 461 { 462 u_short *data; 463 u_char savebyte[2]; 464 int len, len1, wantbyte; 465 u_short totlen; 466 467 totlen = wantbyte = 0; 468 469 for (; m != NULL; m = m->m_next) { 470 data = mtod(m, u_short *); 471 len = m->m_len; 472 if (len > 0) { 473 totlen += len; 474 475 /* Finish the last word. */ 476 if (wantbyte) { 477 savebyte[1] = *((u_char *)data); 478 *addr = *((u_short *)savebyte); 479 data = (u_short *)((u_char *)data + 1); 480 len--; 481 wantbyte = 0; 482 } 483 /* Output contiguous words. */ 484 if (len > 1) { 485 len1 = len/2; 486 word_copy_to_card(data, addr, len1); 487 data += len1; 488 len &= 1; 489 } 490 /* Save last byte, if necessary. */ 491 if (len == 1) { 492 savebyte[0] = *((u_char *)data); 493 wantbyte = 1; 494 } 495 } 496 } 497 498 if (wantbyte) { 499 savebyte[1] = 0; 500 *addr = *((u_short *)savebyte); 501 } 502 503 if(totlen < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { 504 /* 505 * Fill the rest of the packet with zeros. 506 * N.B.: This is required! Otherwise MB86950 fails. 507 */ 508 for(len = totlen + 1; len < (ETHER_MIN_LEN - ETHER_CRC_LEN); 509 len += 2) 510 *addr = (u_short)0x0000; 511 totlen = (ETHER_MIN_LEN - ETHER_CRC_LEN); 512 } 513 514 return (totlen); 515 } 516 517 /* 518 * Copy packet from board RAM. 519 * 520 * Trailers not supported. 521 * 522 */ 523 static void 524 qn_get_packet(struct qn_softc *sc, u_short len) 525 { 526 register u_short volatile *nic_fifo_ptr = sc->nic_fifo; 527 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 528 struct mbuf *m, *dst, *head = NULL; 529 register u_short len1; 530 u_short amount; 531 532 /* Allocate header mbuf. */ 533 MGETHDR(m, M_DONTWAIT, MT_DATA); 534 if (m == NULL) 535 goto bad; 536 537 /* 538 * Round len to even value. 539 */ 540 if (len & 1) 541 len++; 542 543 m->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 544 m->m_pkthdr.len = len; 545 m->m_len = 0; 546 head = m; 547 548 word_copy_from_card(nic_fifo_ptr, 549 mtod(head, u_short *), 550 sizeof(struct ether_header)); 551 552 head->m_len += sizeof(struct ether_header); 553 len -= sizeof(struct ether_header); 554 555 while (len > 0) { 556 len1 = len; 557 558 amount = M_TRAILINGSPACE(m); 559 if (amount == 0) { 560 /* Allocate another mbuf. */ 561 dst = m; 562 MGET(m, M_DONTWAIT, MT_DATA); 563 if (m == NULL) 564 goto bad; 565 566 if (len1 >= MINCLSIZE) 567 MCLGET(m, M_DONTWAIT); 568 569 m->m_len = 0; 570 dst->m_next = m; 571 572 amount = M_TRAILINGSPACE(m); 573 } 574 575 if (amount < len1) 576 len1 = amount; 577 578 word_copy_from_card(nic_fifo_ptr, 579 (u_short *)(mtod(m, char *) + m->m_len), 580 len1); 581 m->m_len += len1; 582 len -= len1; 583 } 584 585 /* Tap off BPF listeners */ 586 bpf_mtap(ifp, head); 587 588 (*ifp->if_input)(ifp, head); 589 return; 590 591 bad: 592 if (head) { 593 m_freem(head); 594 log(LOG_INFO, "qn_get_packet: mbuf alloc failed\n"); 595 } 596 } 597 598 /* 599 * Ethernet interface receiver interrupt. 600 */ 601 static void 602 qn_rint(struct qn_softc *sc, u_short rstat) 603 { 604 int i; 605 u_short len, status; 606 607 /* Clear the status register. */ 608 *sc->nic_r_status = CLEAR_R_ERR; 609 610 /* 611 * Was there some error? 612 * Some of them are senseless because they are masked off. 613 * XXX 614 */ 615 if (rstat & R_INT_OVR_FLO) { 616 #ifdef QN_DEBUG 617 log(LOG_INFO, "Overflow\n"); 618 #endif 619 ++sc->sc_ethercom.ec_if.if_ierrors; 620 } 621 if (rstat & R_INT_CRC_ERR) { 622 #ifdef QN_DEBUG 623 log(LOG_INFO, "CRC Error\n"); 624 #endif 625 ++sc->sc_ethercom.ec_if.if_ierrors; 626 } 627 if (rstat & R_INT_ALG_ERR) { 628 #ifdef QN_DEBUG 629 log(LOG_INFO, "Alignment error\n"); 630 #endif 631 ++sc->sc_ethercom.ec_if.if_ierrors; 632 } 633 if (rstat & R_INT_SRT_PKT) { 634 /* Short packet (these may occur and are 635 * no reason to worry about - or maybe 636 * they are?). 637 */ 638 #ifdef QN_DEBUG 639 log(LOG_INFO, "Short packet\n"); 640 #endif 641 ++sc->sc_ethercom.ec_if.if_ierrors; 642 } 643 if (rstat & 0x4040) { 644 #ifdef QN_DEBUG 645 log(LOG_INFO, "Bus read error\n"); 646 #endif 647 ++sc->sc_ethercom.ec_if.if_ierrors; 648 qnreset(sc); 649 } 650 651 /* 652 * Read at most MAX_PACKETS packets per interrupt 653 */ 654 for (i = 0; i < MAX_PACKETS; i++) { 655 if (*sc->nic_r_mode & RM_BUF_EMP) 656 /* Buffer empty. */ 657 break; 658 659 /* 660 * Read the first word: upper byte contains useful 661 * information. 662 */ 663 status = *sc->nic_fifo; 664 if ((status & 0x7000) != 0x2000) { 665 log(LOG_INFO, "qn: ERROR: status=%04x\n", status); 666 continue; 667 } 668 669 /* 670 * Read packet length (byte-swapped). 671 * CRC is stripped off by the NIC. 672 */ 673 len = *sc->nic_fifo; 674 len = ((len << 8) & 0xff00) | ((len >> 8) & 0x00ff); 675 676 #ifdef QN_CHECKS 677 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN) || 678 len < ETHER_HDR_LEN) { 679 log(LOG_WARNING, 680 "%s: received a %s packet? (%u bytes)\n", 681 device_xname(sc->sc_dev), 682 len < ETHER_HDR_LEN ? "partial" : "big", len); 683 ++sc->sc_ethercom.ec_if.if_ierrors; 684 continue; 685 } 686 #endif 687 #ifdef QN_CHECKS 688 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 689 log(LOG_WARNING, 690 "%s: received a short packet? (%u bytes)\n", 691 device_xname(sc->sc_dev), len); 692 #endif 693 694 /* Read the packet. */ 695 qn_get_packet(sc, len); 696 697 ++sc->sc_ethercom.ec_if.if_ipackets; 698 } 699 700 #ifdef QN_DEBUG 701 /* This print just to see whether MAX_PACKETS is large enough. */ 702 if (i == MAX_PACKETS) 703 log(LOG_INFO, "used all the %d loops\n", MAX_PACKETS); 704 #endif 705 } 706 707 /* 708 * Our interrupt routine 709 */ 710 int 711 qnintr(void *arg) 712 { 713 struct qn_softc *sc = arg; 714 u_short tint, rint, tintmask; 715 char return_tintmask = 0; 716 717 /* 718 * If the driver has not been initialized, just return immediately. 719 * This also happens if there is no QuickNet board present. 720 */ 721 if (sc->sc_base == NULL) 722 return (0); 723 724 /* Get interrupt statuses and masks. */ 725 rint = (*sc->nic_r_status) & NIC_R_MASK; 726 tintmask = *sc->nic_t_mask; 727 tint = (*sc->nic_t_status) & tintmask; 728 if (tint == 0 && rint == 0) 729 return (0); 730 731 /* Disable interrupts so that we won't miss anything. */ 732 *sc->nic_r_mask = CLEAR_R_MASK; 733 *sc->nic_t_mask = CLEAR_T_MASK; 734 735 /* 736 * Handle transmitter interrupts. Some of them are not asked for 737 * but do happen, anyway. 738 */ 739 740 if (tint != 0) { 741 /* Clear transmit interrupt status. */ 742 *sc->nic_t_status = CLEAR_T_ERR; 743 744 if (sc->transmit_pending && (tint & T_TMT_OK)) { 745 sc->transmit_pending = 0; 746 /* 747 * Update total number of successfully 748 * transmitted packets. 749 */ 750 sc->sc_ethercom.ec_if.if_opackets++; 751 } 752 753 if (tint & T_SIXTEEN_COL) { 754 /* 755 * 16 collision (i.e., packet lost). 756 */ 757 log(LOG_INFO, "qn: 16 collision - packet lost\n"); 758 #ifdef QN_DEBUG1 759 qn_dump(sc); 760 #endif 761 sc->sc_ethercom.ec_if.if_oerrors++; 762 sc->sc_ethercom.ec_if.if_collisions += 16; 763 sc->transmit_pending = 0; 764 } 765 766 if (sc->transmit_pending) { 767 log(LOG_INFO, "qn:still pending...\n"); 768 769 /* Must return transmission interrupt mask. */ 770 return_tintmask = 1; 771 } else { 772 sc->sc_ethercom.ec_if.if_flags &= ~IFF_OACTIVE; 773 774 /* Clear watchdog timer. */ 775 sc->sc_ethercom.ec_if.if_timer = 0; 776 } 777 } else 778 return_tintmask = 1; 779 780 /* 781 * Handle receiver interrupts. 782 */ 783 if (rint != 0) 784 qn_rint(sc, rint); 785 786 if ((sc->sc_ethercom.ec_if.if_flags & IFF_OACTIVE) == 0) 787 qnstart(&sc->sc_ethercom.ec_if); 788 else if (return_tintmask == 1) 789 *sc->nic_t_mask = tintmask; 790 791 /* Set receive interrupt mask back. */ 792 *sc->nic_r_mask = NIC_R_MASK; 793 794 return (1); 795 } 796 797 /* 798 * Process an ioctl request. This code needs some work - it looks pretty ugly. 799 * I somehow think that this is quite a common excuse... ;-) 800 */ 801 int 802 qnioctl(register struct ifnet *ifp, u_long cmd, void *data) 803 { 804 struct qn_softc *sc = ifp->if_softc; 805 register struct ifaddr *ifa = (struct ifaddr *)data; 806 #if 0 807 struct ifreg *ifr = (struct ifreg *)data; 808 #endif 809 int s, error = 0; 810 811 s = splnet(); 812 813 switch (cmd) { 814 815 case SIOCINITIFADDR: 816 ifp->if_flags |= IFF_UP; 817 818 switch (ifa->ifa_addr->sa_family) { 819 #ifdef INET 820 case AF_INET: 821 qnstop(sc); 822 qninit(sc); 823 arp_ifinit(ifp, ifa); 824 break; 825 #endif 826 default: 827 log(LOG_INFO, "qn:sa_family:default (not tested)\n"); 828 qnstop(sc); 829 qninit(sc); 830 break; 831 } 832 break; 833 834 case SIOCSIFFLAGS: 835 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 836 break; 837 /* XXX see the comment in ed_ioctl() about code re-use */ 838 if ((ifp->if_flags & IFF_UP) == 0 && 839 (ifp->if_flags & IFF_RUNNING) != 0) { 840 /* 841 * If interface is marked down and it is running, then 842 * stop it. 843 */ 844 #ifdef QN_DEBUG1 845 qn_dump(sc); 846 #endif 847 qnstop(sc); 848 ifp->if_flags &= ~IFF_RUNNING; 849 } else if ((ifp->if_flags & IFF_UP) != 0 && 850 (ifp->if_flags & IFF_RUNNING) == 0) { 851 /* 852 * If interface is marked up and it is stopped, then 853 * start it. 854 */ 855 qninit(sc); 856 } else { 857 /* 858 * Something else... we won't do anything so we won't 859 * break anything (hope so). 860 */ 861 #ifdef QN_DEBUG1 862 log(LOG_INFO, "Else branch...\n"); 863 #endif 864 } 865 break; 866 867 case SIOCADDMULTI: 868 case SIOCDELMULTI: 869 log(LOG_INFO, "qnioctl: multicast not done yet\n"); 870 #if 0 871 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 872 /* 873 * Multicast list has changed; set the hardware filter 874 * accordingly. 875 */ 876 log(LOG_INFO, "qnioctl: multicast not done yet\n"); 877 error = 0; 878 } 879 #else 880 error = EINVAL; 881 #endif 882 break; 883 884 default: 885 error = ether_ioctl(ifp, cmd, data); 886 } 887 888 splx(s); 889 return (error); 890 } 891 892 /* 893 * Dump some register information. 894 */ 895 #ifdef QN_DEBUG1 896 static void 897 qn_dump(struct qn_softc *sc) 898 { 899 900 log(LOG_INFO, "t_status : %04x\n", *sc->nic_t_status); 901 log(LOG_INFO, "t_mask : %04x\n", *sc->nic_t_mask); 902 log(LOG_INFO, "t_mode : %04x\n", *sc->nic_t_mode); 903 log(LOG_INFO, "r_status : %04x\n", *sc->nic_r_status); 904 log(LOG_INFO, "r_mask : %04x\n", *sc->nic_r_mask); 905 log(LOG_INFO, "r_mode : %04x\n", *sc->nic_r_mode); 906 log(LOG_INFO, "pending : %02x\n", sc->transmit_pending); 907 log(LOG_INFO, "if_flags : %04x\n", sc->sc_ethercom.ec_if.if_flags); 908 } 909 #endif 910 911 #endif /* NQN > 0 */ 912